With the death last week of a blackbuck, the species' population at the Karachi Zoological Gardens has been reduced from 28 to a mere three over five years, and there is little hope of any increase since the remaining females have no mates. The female blackbuck was discovered dead about a week ago. It was assumed that she died after colliding with the fence whilst running, since the animal had been healthy and no other reason was apparent, said a source. Zoo officials failed to respond to Dawn's inquiries about the real cause of death. An autopsy of any animal that dies is mandatory under the zoo's regulations. "The post-mortem procedure to identify the real cause of the animal's death is not just a ritual but an extremely important measure to prevent further deaths,' said a source. "There used to be a three-member team